Electrical automobile safety device



ELECTRICAL AUTOMOBILE SAFETY DEVICE Filed March ll, 1949 29 l lmsm/euren 1/||| fw v i v v .frank/N6 P1 as: l

2 3a 36 ,ql :0A/ucr IK axel/ren 42 1MP" 33 'lam/nou 42 8 6 cau Doon525i/TCH n I IIJ/1 32 r /6l/I/0A/.fy/7g #L @Il I I g 12 r Mmmm .sv/mv V34 A L .sn/emr .rv/my 11 Y M .mnm 5 f4 z/m/ L s@ IN VEN TOR. YB AJojfcsch/ to the ground I.

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I6 the contact of which cooperates with a movable contact carried by aspring I?. An electromagnet I9 provided with a coil I8 cooperates withan armature 20 carried by the spring II in such a manner that thecontacts of the contact carriers I6 and I'I are closed, if the coil I8is not passed by a current, but opened, if the electromagnet I9 isenergized and attracts the armature 20. A line ZI connects. one end ofthe coil I8 with the generator II," and the other end to the ground I.

The contact spring I'I is connected by a line; 22 through a door switch23 with the groundLz o This switch 23 of conventional form is arranged'vat one of the doors of the vehicleand is openedby any desired, wellknown device- (notshown) if the door is properly closed, but closed, ifthe: door is being opened. To each of the doors, one' similar switch isassociated and all ,these door switches are arranged in parallel. In thepresent example, besides the door switch 23 asecond door switchV 24V isshown, `but'it will ,be seen that anyIdesired-fnumber ofmsuch-switchesinay be providedacc'ording' Vto thenu'mber of. doors.

The 'upper terminal of the horn I4 "is conswitch 26 to the ground ILv"This commonly used switch serves tooperate the :horn I4 intentionallyin a' wellfknown manner; From the point [2l of the'line I5,'thereAextends'a line 28 through a hand-operated switch 29 to the point 30 of`the line 22 so 'that the switch 29 is arranged in vparallel with theelectromagnetic switch I6 to 20. Moreover, fromthe line 22 leads aline3| vthrough the pair of contacts 8 to the ground I.g

From the distributing pointv I2 leads` the pri- `mary ignition circuitv3i. to the primary winding 33 'of theinductive or ignition coil andfurther through the contact breaker lever 35 actuated-by the rotatingycam 34, and the breaker contacts 36 A condenser 31 isarranged inparallel with these'contacts in a Well-known lman- The secondary winding38 ofA the ignition coil is connected through a line 39 to thedistributor 40 which supplies the' spark plugs 4I withA current. Fromthe line 32 leads a line 42 to an additional winding 43 of the ignitioncoil,which i winding extends oppositelyto the primary'winding 33, andfurther through the contacts 84 to the ground I.

Contacts 44 controlled by thestarter switch'l 4 are connected through alinev 45 to the distributing point I2. Parallel with Vthese contacts 44,thereis arranged a switch 41 by means of a line 46, which switch' isheld in its open position by a by depressing the clutch" such asscreen-heater, screen-wiper, indicator orthe like.

The systemloperates as follows: With the engine standing still, the-alarm circuit extends from the distributing 'point I2 through line I3,`horn I4, line I5, contact carrier I6, contact springVHA VI1 and furtherthrough line 22, door switch 23 (or 24) to the ground I. If the ignitionswitch 6 is. closed and the .contacts 1 thus l-interconnected, thedistributing point I2 is supplied with one of the door switches 23', 24horn I4is operated.

closed the When the 'ignition switch 6 is vopen-that is current from thebattery 2. If, -moreoven'one of the doors of the vehicle is open and'therefore @i-Wiege vf; en. igmconicelr anaal-1.1. f

5 wire, when, moreover, one of the doors is open,

the horn I4 is actuated since the distributing point I2 is supplied withcurrent and therefore the said alarm circuit completed. The same effeetis -obtainedi when, with fthefengina standing lo'l'fstill, theAdriveropens a, door to leave the vehicle, and has forgotten to switchoff the ignition ilswitch 6.

Whenthe lengine has been started, but the generator IIhas not yetreached a sufficient .1 5 number of revolutions to cause theelectromagnet i lI3 to attract-the armature 20, the horn I4` does notsound,` if all doors are properly closed. If, however, one of the doorsis open and therefore one of4 the door switches 23, 24 etc. closed, thealarm circuit is completed thereby so that the .horn I4 indicates to"the driver that the door for doors areopen.v 1 It'is,jm0reover,desirable to indicatel to the driver vduring theV drive, whether yalldoors y. are

a y, A .25closed` For this purpose,y therdriver'teinporarily nected byVai linei "thro'ugh Va hand-'operated vcloses the4 control switch29whereby-the broken contacts of the electromagne't I5 are bridged overand the horn` indicates to the driver that oneor .more of ythe doorslare not properly closed,fwith 30, out the necessity for the driver toturn back during thedrive. l A Y If the ignition switch 6 is switchedoff and vtherefore the'contacts interconnected, but the ignition circuit32 has been directly connected to lthe battery 2 by an unauthorizedperson and the fatte'mpt is made to start the engine by operatingithe'starter switch 4, the horn I 4 sounds also with the doors closed,since in such a Icase the contact spring I1 is connected through theline 3l and the contacts '8 to' the ground I.` At, the lsame time,current flows through line 42, addi- "tional winding 43 and contacts totheground I so that the inductive eiect offthe vprimary winding A33 'isweakened andsparks are not ob- 45 tained at'the spark plugs 4I.. It willbe seen, 'therefore,'that the engine cannot bestarted in fspite ofrepeated attempts. f j When the driver actuates the starter switch r4,but has forgotten to previously switch on the ignitingswitch 6, currentflows from the'battery 2 through the starter switch 4, line 45',distribut- 'ing point I2, line I3, horn I4, 1ine'I5,'contacts 'ofthe-contact carriers AI6 and Il, lines 22 and 3l', contacts -8 to theground I'so that the alarm signal'indicates to the driverthat theYignition -switcht is open. Thesame eiect is obtained, whenanunauthorized person has connected the "ignition circuit 32 toth'e'battery'and tries to start the engine. Y

When an attempt is made to depress the clutch -pedal 48 with theengine'standing still, in order "to separate the engine from the gearset-'the :switch 41 is closed andthe distributing point I2 thereforesupplied with current which flows 65 I from this point along the samepath'as described `in the foregoing paragraph. Also in this case :thealarm signal sounds,irrespective'whetherV or -fnot the doors'are closed."1 y f' `What'Iclaimis:V v- 'A l. An electrical: safety'- device` formotorvehif'cles vdriven by, an vinternal combustion engine, `whichcomprises- Vabattery, aV generator'driven -by said engine and 'connectedtov said"v battery, a primary ignition circuitcomprising'a primaryarranged in parallel with said ignition circuit and comprising an alarmdevice, an electromagnetic switch in said alarm circuit, electromagneticmeans connected to said generator and opening said electromagneticswitch, if energized by said generator, at least one door switch in saidalarm circuit, said door switch being opened, if a door of the vehicleis closed and vice versa, a hand-operated ignition switch comprising twopairs of contacts, one pair of which is arranged in said ignitioncircuit and is interconnected by said ignition switch in its closedposition, whereas the other pair of contacts is arranged in said alarmcircuit in parallel with said door switch and is interconnected by saidignition switch in its open position, and an additional winding of saidignition coil, connected to that part of said alarm circuit which isconnected to the last named pair of contacts, said additional windingbeing arranged so that its inductive effect is opposite to that of theprimary winding of said ignition coil.

2. An electrical safety device for motor vehicles driven by an internalcombustion engine, which comprises a battery, a generator driven by saidengine and connected to said battery, a primary ignition circuit, analarm circuit arranged in parallel with said ignition circuit andcomprising an alarm device, an electromagnetic switch in said alarmcircuit, electromagnetic means connected to said generator and openingsaid electromagnetic switch, if energized by said generator, at leastone door switch in said alarm circuit, said door switch being closed ifthe associated door is being opened so as to complete said alarm circuitwith the engine standing still and therefore said electromagnetic switchbeing closed, and a hand-operated ignition switch comprising two pairsof contacts, one pair of which is arranged in said ignition circuit andis interconnected by said ignition switch in its closed position so asto complete said ignition circuit, as well as at the same time saidalarm circuit, if said electromagnetic switch and said door switch areclosed, whereas the other pair of contacts is arranged in said alarmcircuit in parallel with said door switch and is interconnected by saidignition switch in its open position.

3. An electrical safety device for motor vehicles driven by an internalcombustion engine as claimed in claim 2, wherein a starter switch isarranged in parallel with said ignition switch so that, if said ignitionswitch is opened and said starter switch closed, said alarm circuit iscompleted and said alarm device actuated.

4. An electrical safety device for motor vehicles driven by an internalcombustion engine as claimed in claim 2, wherein a hand-operated controlswitch is connected to said alarm circuit and arranged in parallel withsaid electromagnetic switch so that, when said control switch and saiddoor switch are closed, said alarm circuit is completed and said alarmdevice actuated.

RUDOLF J OKSCH,

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,116,324 Perkins Nov. 3, 1914.1,257,259 Leslie Feb. 19, 1915 1,372,678 Eisner May 29, 1921 1,454,216Eberly May 8, 1923 1,720,230 Murray July 9, 1929

